el filo - edge (especially of something, such as a knife, designed to cut things)Spanish example: Humanizar el comportamiento de los animales suele ser, además de un error, un argumento de doble filo.
English example: Humanizing the behavior of animals is usually, in addition to being an error, a double-edged argument.
Source:
el filo - edge (especially of something, such as a knife, designed to cut things)
